Gasket for rotating kilns



Jul 8, 1-924; 1,500,589

J. L. LUNDBERG GASKET FOR ROTATING KILNS Filed May 29 1922 2 Sheets-Sheet l Jul 8, 1924.- 1,500,589

J. L. LUNDBERG GASKET FOR ROTATING KILNS Filed May 29 1922 2 Sheets-Sheet 2 Patented July 8, 1924.

Jenn L. Lmnnne, or ALPENA, mromean, ASSIGNOR TO nunon mum ma,

or ALPENA, MICHIGAN, A coarona'non or mromoan.

GASKET FOR ROTATING KIL'NS.

Application filed May 29, 1922. Y Serial no. 564,356.

To all whom it may concern:

Be it known that I, JOHN L. LUNDBERG, a sub'ect of the King of- Sweden, residing at Alpena, in the county of Alpena and W State of Michigan, have invented certain new and useful Improvements in Gaskets for Rotating Kilns, of which the followmg is a specification. I

This invention relates to kilns especially no cement; kilns. Ithas for its object a gasket maintained by gravity at the joint between the rotating kiln and the furnace wall, or between the kiln and any other stationary body with which either end ,is connected. Rt It is found desirable -in the use of a cement kiln to conduct the products of combustion into a furnace chamber in which are located a pluralit of water tubes for generating steam. T is utilizes the heat which W would otherwise be wasted, for useful purposes in transforming the heat energy into steam which can be made to do useful work about the plant. In order to couple up the cement kiln with a furnace of this kind it W is necessary to have a fairly tight joint between the kiln and the furnace, otherwise cold air will be drawn in at this point and will affect the heat on the tubes. It has already been proposed to place a gasket at the to joint and hold it in sealing relation with s rings, but this has not proved very satlsactory in practice.

It is the object of the present invention to use a gasket and hold it in place against 85 the rotating kiln by gravity. This gasket is carried on a carriage which runs on an inclined track that, may have a universal adjustment within given limits to bring the gasket into a proper relation with the ring along which it slides and with the kiln body. This will be more fully explained hereafter.

In the drawings Fig. 1 is a sectlon taken on the line 1-1 of Fig. 2.

Fig. 2 is an elevation of the end of the kiln, the mouth of the furnace and the joint between them.

Fig. 3 is a cross section through the same 0 parts.

' In cement making the material to be roasted is introduced at the higher end of the rotating kiln body and discharged at the lower end. Heat is generated at the lower end of the kiln by the combustion of powdered coal or some other fuel delivered through a suitable nozzle. The products of combustion are drawn up through the kiln body and discharged from the upper end of the kiln body. It has been found useful to use these products of combustion to enerate steam hence they are now introduce into afurnace chamber where they come in contact with pipes or otheroontainers in which is the water. Now it is necessary to secure a fairly tight joint between the rotating kiln and the furnace in order to economlcally use this heat. It is the object of the presentinvention to secure such a joint.

a designates the kiln body which is rotated by suitable gearing not shown; it is a relatively long cylinder approximately 100 feet in length and usually about 8 feet in diameter. This kiln is made of a metal shell lined with fire brick. It has a reduced neck portion 6 which extends into the mouth a of the furnace. Bolted to the shoulder formed by the junction of the neck with the body of the kiln is a ring d. Secured to the mouth of the furnace is a mouth ring e which slopes from the inner end to the outer end downwardly. Mounted on this rin is a gasket f which has a central opening sfi) ing downwardly from the inside to the outside in a similar way to the slope of the ring 6. This ring f is a large heavy casting weighing a ton or more. It has a groove :27 for containing a sealing rin ya The gasket f will not ordinarily bear on the sloping ring 6 but is provided at each side with the brackets h, the lower ends of which. form carriages with longitudinally runnin V-grooves z. These carriages ride on the rol ers f which are formed of two coned frustums matched together at their bases. These rollers are held between the carriage and the inclined track j which also have a V-groove k in which the rollers are supported. This track is held in a support m. The bolts n are threaded through the sup ort at the bottom and may be adjusted by oosening the lock nuts to raise the track and the carriage bodily or tilt the same to the an larity of the gasket. Similarly the end bo t 0 can be adjusted to change the longitudinal position of we the track while the bolts p may be adjusted contactin surfaceso the The r1 at tliis point.

Preferably I use acking a between the asket and the rubring d. 's insures an absolutely air ti ht joint at this point. It will also be desira Is to make the gasket in two sections bolted together as at 1 so t at it may be assembled easily in place. 0

This gra 'ty gasket w1ll be found a great improvement over askets that are mamtained in sealing re ation by s rings. The

, kiln moves longitudinally in its operation the springs in time.

and consequently when springs are they are'more or less compressed epending u on how close the end of the kiln approac es the furnace. Of course the more they are compressed the greater is their pressure upon the contacting rings. The consequence 15 that at all times the pressure on the contacting surfaces is not uniform, being first light and then very heavy, depending upon the position of the end of the kiln with respect to the furnace. This results in a rapid wearing of'the contact' surfaces and almost invariably results in melting some or all of With some of the springs broken the gasket leaks and becomes quite unfit for the urposes intended. It is hard to repair 5 ets of this kind because the owners of t ese kilns can not afiord to stop the kilns as it is customary to run them continually-24 hours in a day.

With the gravity operating gasket that I have designed, the inclination of the track is relatively small, consequently this gasket,

' weighing over a ton and a half, bears against the rub-ring with only a light pressureabout 200 pounds for the entire surface of the gasket. This results in an efiective sealin that does not result in undue wear or friction occasioning power losses.

What I claim is:

1. In a joint for a rotating cylinder, the combination of a stationary member. pro-- vided witha mouth, a rotating cylinder body having one end adjacent the mouth of said member and a gravity pressed gasket arranged to seal the joint between the endof the c linder and the mouth.

2. In a'joint for a rotating kiln, the combination of a stationary member provided with a mouth having a ring thereon, a rotatin having one end adjacent the mout of said member and a gasket supported about the mouth ring and the .bin

jgint between the'mouth and the ln body by pressure exerted through the agency of gravl In a oint, the combination of a stationary member provided with a mouth and a ring supported about the mouth and $10 ing downwardly from the inner end to the outer end, a relatively movable body having one of its ends adjacent to said ring and a gasket mounted around the said mouth and held in sealing contact with the end 0 the body by gravity.

4. In a joint for a rotating body, the combination of .a stationary member rovided with a mouth, a ring su ported a 'ut the mouth and a gasket shdab e by gravi along said ring, a rotating body posltion adjacent to said mouth ring, the said asket 'being maintained against the end 0 the body in sealing relation by gravity;

5. In a joint for a rotating. body, the com-.

bination of a stationary member provided with a mouth and a ring su orted about the mouth, a rotating body wt one end adjacent to said ring, a asket slidable alo the ring by gravity an against the end 0 the body in sealing relation, and carriage for supporting said gasket concentric with the said mouth ring.

6. I a joint for a rotating body, the comon of a stationary member rovided with a mouth,,a rin supported a ut the mouth, a rotating y having one end adjacent to the ring, a rub-ring secured to the end of the body and a ket slidable'along the mouth ring by gravlty and held by gravity in sealing relation with said rub-ring.

7. In a joint, the combination of a stationary member provided with a mouth, a ring supported about the mouth, a relatively movable body havin one end adjacent the mouth ring, a gas et slidable along the mouth ring and against the end of the body by gravity, a carriage for supporting the said gasket, and an inclined track upon which the carriage nms and which has a universal adjustability.

8. In a joint for a rotating body, the combination of a stationary member rovided with a mouth, a rin supported a ut the mouth and sloping om-the inner end to the outer end, a rotating body adjacent to the end of. said mouth ring, a gasket slidable downwardly along said s oping mouth ring and a carriage upon which the said gasket rides, the sad gasket bein maintained in iii the carriage is supported and anti-friction rollers between the track and the carriage.

10. In a joint, the combination of a stationary member provided with a mouth, a ring about the mouth, a relatively movable body having one end adjacent the mouth ring, a gasket supported to slide along the mouth ring and against the end of the body through the action of gravity, a carriage upon which the gasket is carried, an inclined 1 track upon which the carriage runs and means for adjusting the position of the track to bring the gasket in proper relation with the end of the body and the mouth ring.

In testimony whereof I affix my signature.

JOHN L. LUNDBERG. 

